Thanks for the suggestion - is it possible to query the browser to find which type of theme the user prefers? I will look into that.
With the relays, right now, it queries the big relays that offer spam filtering as I was finding flooding a rather big problem. For writing, it writes to about 6 public relays, including one that tries to rebroadcast to all know relays.
I'm not a developer so take this with a grain of salt, but this may help: https://medium.com/hypersphere-codes/detecting-system-theme-in-javascript-css-react-f6b961916d48
I'm guessing you do a bit of content caching to smooth how things load for the user? I don't see the usual chaotic load of most clients, that's great.
If you want to diversify from the large relays, you're also welcome to add my relay: wss://n.ok0.org - it's spam free at the moment and has some basic filtering in place.
